• 대한기계학회논문집A
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• 제36권10호
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• pp.1155-1162
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• 2012

알루미늄 크래쉬 박스는 저속충돌조건에서 프론트 사이드 멤버를 변형을 방지하기 위한 부품이다. 본 연구에서는 저속충돌조건에서 비드형상이 알루미늄 크래쉬 박스의 충돌성능에 미치는 영향을 분석하였다. Edge concave, surface convex 와 surface concave 타입의 비드형상들에 대한 충돌해석 및 실험을 수행하여 비드가 없는 normal 타입의 알루미늄 크래쉬 박스의 충돌성능과 비교분석하였다. 충돌성능은 저속충돌조건에서 크래쉬 박스의 초기 최대하중 및 충돌에너지 흡수능으로 평가하였다. 이를 검증하기 위해 알루미늄 크래쉬 박스와 결합된 프론트 사이드 멤버에 대해 저속충돌실험 수행하고, 이를 분석하였다. Surface concave 타입의 비드가 삽입된 알루미늄 크래쉬 박스 경우, 프론트 사이드 멤버의 변형을 방지할 수 있음을 확인하였다.

• 대한조선학회논문집
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• 제42권3호
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• pp.197-204
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• 2005

A waterjet propulsion system has many advantages compared with a conventional screw propeller especially for amphibious armored wheeled vehicles because of a good maneuverability at low speed, good operation ability at shallow water, high thrust at low speed to aid maneuverability and exit from water, etc. The POD type waterjet is adequate for the present wheeled vehicle because the weight is lighter and L/B is longer than the conventional armored amphibious vehicle. Resistance and self-propulsion tests with a 1/3.5-scale model are conducted at PNU towing tank. Based on these measurements, the performance is analyzed according to ITTC 96 standard analysis method and also according to the conventional propulsive factor analysis method. Based on these two methods, the full-scale effective and delivered powers of amphibious armored wheeled vehicle are estimated. This paper emphasizes the analysis method of model test of the waterjet propulsion system for a amphibious armored wheeled vehicle and the model test technique together with the comparison of the two analysis methods.

• 한국ITS학회 논문지
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• 제9권1호
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• pp.121-130
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• 2010

최근 무선인터넷 환경과 휴대용 장비의 발달로 내비게이션 업체에서는 다양한 위치기반서비스를 위하여 보다 많은 공간정보가 요구되며, 이를 위하여 많은 비용을 투자하고 있다. 그러나 우리나라는 NGIS(National Geographic Information System)사업으로 풍부한 공간정보가 구축되어 있으며, 이 정보를 활용하여 필요한 공간정보를 구축함으로써 비용을 절감할 수 있다. 이에 인터넷 건축행정정보시스템과 도로명주소 관리시스템의 건물객체 정보를 연계하기 위한 구체적인 방법을 제안하였다. 이를 위하여, 두 시스템의 데이터베이스를 분석하여 매핑테이블을 설계하였으며, 주건물 수와 부속지번 유무를 판단하여 속성정보를 연계하고 CAD자료와 도로명주소 기본도의 건물 간의 객체 매칭을 통하여 매핑테이블을 생성하였다. 그러나 한정된 자료를 바탕으로 실험을 수행하여 본 연구에서 제안된 방법론의 평가가 부족하며, 향후 다양한 데이터에 적용해 봄으로써 제안된 방법을 평가해야 할 것이다.

• Child Health Nursing Research
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• 제7권1호
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• pp.108-117
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• 2001

This research objected to the diagnosed patients as acute lymphoblastic leukemia, acute myelogenous leukemia, neuroblastoma, non-Hodgkins lymphoma, Hodgkin's disease, kidney tumor, myelodysplastic syndrom and juvenile chronic leukemia after admission in the 'P' hospital in Pusan from Aug. 1. 1999 to Jan. 31. 2000. The results of this study are summarized as follows. 1. On the specific character between the experimental(exp.) group and the control (con.) group : there were 7 of 4-7 years old patients(the most) in the experimental group(53.8％), 5 of 12 years old or older patients in the control group (38.5％). Patients who experienced operation were 7 in the exp. group(53.8％) and 6 in con. group(46.2％). The largest number of the patients' diagnosis was acute lymphoblastic leukemia by 5 in the exp. group(38.5％) and 4 in the con. group (30.8％). The hardest nausea came on the second day by 5 in the exp. group(38.5％), 9 in the con. group(69.2％). 2. P-score of the nausea vomiting on the number of daily anticancer drug administration : first day, the exp. group got 9.6 and the con. group 17.6(P = 0.03). 2nd day, 10.9 and 19.4(P = 0.00), 3rd day, 10.6 and 18.3(P = 0.00), 4th day 10.0 and 18.0, 5th day 10.9 and 16.8(P = 0.05). The score showed statistically significant difference(P < .05). 3. Oral intake didn't show statistically significant difference between two groups. However the average of Oral intake of the exp. group was continually higher than the con. group except to the first day after administration. In conclusion, nursing intervention and nutrition care are much more needed on the 2-3th day after administration to reduce nausea vomiting, and for remission of nausea and enlarging oral intake it is utilizable to apply the easy, economic Oral Cryotherapy to the young patients who undergo chemotherapy.

• Child Health Nursing Research
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• 제6권1호
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• pp.51-59
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• 2000

The purpose of this study was to investigate the actual state of and the factors in relation to drinking and smoking of elementary school. The subject for this study consisted of 604 students of six elementary schools located in Pusan. The data were collected by using a anonymous questionnaire during the period from Nov. 1, 1998 to Nov. 15, 1998. The results of this study are summarized as follows. 1. The rate of drinking of the whole respondents was 20.7% (male 25.4%, female 15.6%), the rate of smoking was 8.1%(male 11.7%, female 4.2%). The user of drink and cigarets together showed 5.6%. 2. The school year of the first drinking and smoking was most at the 5th grade in elementary school(drinking 24.8%, smoking 20.4%). The motivation of beginning drinking and smoking was curiosity for the most part(32.0%, 61.2%). As to a way to get drink and cigarets, using a thing in the house' was most(82.2%). As to a used place, their own home or their friends' home showed 32.2% for the most part. Companion was mostly alone(84.0%). 3. Those who had experience of drinking and smoking took more positive attitude toward drinker and smoker, were more hospitable to exhortation to drinking and smoking, and were more positive about the late intention of drinking and smoking, but his desire for health education was lower than not. And he showed overlooking or keeping step with his friend's drinking and smoking. 4. In the results so far investigated difference of drinking and smoking according to a general tendency of respondents. The experience of drinking was related to sex distinction (P=0.003) and the marital status of parents (P=0.001). And the experience of smoking had relation to sex distinction(P=0.001), the marital status of parents(P=0.001), the parent's attitude of bring up(P=0.020) and making use of leisure (P=0.029)(P<.05).

• 대기
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• 제31권5호
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• pp.637-656
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• 2021

The United States has been known as the world's major producer of crops such as wheat, corn, and soybeans. Therefore, using meteorological long-term forecast data to project reliable crop yields in the United States is important for planning domestic food policies. The current study is part of an effort to improve the seasonal predictability of regional-scale precipitation across the United States for estimating crop production in the country. For the purpose, a dynamic downscaling method using Weather Research and Forecasting (WRF) model is utilized. The WRF simulation covers the crop-growing period (March to October) during 2000-2020. The initial and lateral boundary conditions of WRF are derived from the Pusan National University Coupled General Circulation Model (PNU CGCM), a participant model of Asia-Pacific Economic Cooperation Climate Center (APCC) Long-Term Multi-Model Ensemble Prediction System. For bias correction of downscaled daily precipitation, empirical quantile mapping (EQM) is applied. The downscaled data set without and with correction are called WRF_UC and WRF_C, respectively. In terms of mean precipitation, the EQM effectively reduces the wet biases over most of the United States and improves the spatial correlation coefficient with observation. The daily precipitation of WRF_C shows the better performance in terms of frequency and extreme precipitation intensity compared to WRF_UC. In addition, WRF_C shows a more reasonable performance in predicting drought frequency according to intensity than WRF_UC.

• 한국엔터테인먼트산업학회논문지
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• 제13권3호
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• pp.121-129
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• 2019

본 연구는 모바일로 촬영된 영화 <파란만장>(2010)의 텍스트 분석과 텍스트의 생산방식 및 생산방식의 재생산에 초점을 맞추었다. 이 작품은 대상과 이미지가 지표(index)성을 갖지 않는 디지털 영화라는 점을 비롯해 수용자들의 수용적 측면에서 포스트시네마(Post-Cinema)의 속성을 띤다. 논문은 수용적 측면에서 영화문화 전반에 걸친 본질적 변화와 제작 및 소비의 상호작용을 일으킨다는 점에 주목했다. 이 영화는 영화적 가능성의 매개적 위치의 역할을 맡고 있다. 텍스트 내부에서는 만신의 매개가, 텍스트-수용자의 관계는 영화의 매개가, 텍스트 외부에서는 수용자의 타자의 도구에 대한 도구적 욕망이 자리 잡는다. 텍스트 외부에서 해당영화는 타자로서 수용자 주체의 모방욕망을 자극한다. 즉 모바일로 디지털 영화를 만들려는 수용자의 저자로서의 욕망과 연계된다. 이는 기술적 대상들이 새로운 관계를 발생시킬 뿐아니라 인간사회를 새롭게 집단화한다는 시몽동(Simondon)의 사유와 연관된다.

• 식물병연구
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• 제28권4호
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• pp.209-220
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• 2022

Charcoal canker of oak, which has recently increased in southern Iran, could pose a serious threat to the entire forest ecosystem in the near future. In addition, it seems that climate change and its consequences, such as drought in the southern regions of Iran, have exacerbated this phenomenon. Consequently, the objective of this study was to identify the fungal pathogens that could cause charcoal canker disease in the oak forests of South Zagros. It was also sought to find associations between changes in the occurrence/exacerbation of charcoal canker disease under non and intense drought stress in non-inoculated or inoculated Quercus brantii seedlings. In total, 120 isolates were obtained from eight oak forests located in the Zagros Mountains of Southern Iran, Kohgiluyeh & Boyer-Ahmad and Fars provinces, which were classified as Biscogniauxia mediterranea based on morphological assessment. Subsequently, molecular assay confirmed the result by phylogenetic inference of internal transcribed spacer-rDNA regions, α-actin, and β-tubulin genes. The results of the pathogenicity test showed that the response of isolates of B. mediterranea (Iran-G1 and Iran-M70) was varied in different environments for the measured necrotic lesion length. In comparison with the control moisture treatments (non-stress), the necrotic lesion length in inoculated treatments increased under intense drought stress. In general, inoculated oak seedlings' exposure to water-deficient stress by the pathogen of B. mediterranea could affect the spread/severity of the charcoal canker disease.

• Steel and Composite Structures
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• 제46권3호
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• pp.367-383
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• 2023

In this investigation, an improved integral trigonometric shear deformation theory is employed to examine the vibrational behavior of the functionally graded (FG) sandwich plates resting on visco-Pasternak foundations. The studied structure is modelled with only four unknowns' variables displacements functions. The simplicity of the developed model being in the reduced number of variables which was made with the help of the use of the indeterminate integral in the formulation. The current kinematic takes into consideration the shear deformation effect and does not require any shear correction factors as used in the first shear deformation theory. The equations of motion are determined from Hamilton's principle with including the effect of the reaction of the visco-Pasternak's foundation. A Galerkin technique is proposed to solve the differentials governing equations, which enables one to obtain the semi-analytical solutions of natural frequencies for various clamped and simply supported FG sandwich plates resting on visco-Pasternak foundations. The validity of proposed model is checked with others solutions found in the literature. Parametric studies are performed to illustrate the impact of various parameters as plate dimension, layer thickness ratio, inhomogeneity index, damping coefficient, vibrational mode and elastic foundation on the vibrational behavior of the FG sandwich plates.

• 생명과학회지
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• 제18권10호
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• pp.1442-1446
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• 2008

본 연구는 10개의 Microsatellite를 이용하여 국내 한우집 단 586두(경기: 100, 전남: 100, 전북: 100, 경남: 100, 경북:86, 강원: 100)와 보증종모우 집단(39두)간의 유전적 거리추정 및 계통지도의 작성을 통해 보증종모우 집단과 지역별 한우집단의 유전적 특성과 유연관계 분석을 실시하였다. 10개의 MS marker의 분석 결과 기대이형접합도의 경우 경남지역에서 가장 높은 0.780을 나타내었으며 종모우 집단에서 가장 낮은 0.760을 나타내었다. 관측된 이형접합도의 경우 종모우 집단에서 가장 높은 0.818을 나타내었으며 경북지역에서 가장 낮은 0.721을 나타내었다. 검출된 대립유전자의 수에서는 것으로 확인 되었다. 종모우 집단은 가장 높은 관측이형접합도를 나타냈음에도 불구하고 가장 낮은 대립유전자의 수를나타내고 음을 확인하였다. 7개의 집단 간의 유전적 유연관계 분석한 결과 강원도 집단의 한우와 경기, 경북의 유전적 거리가 각 0.021로 가장 가까운 것으로 확인 되었으며 경기와 경북 간의 유전적 거리는 0.032인 것으로 가장 먼 것으로 확인 되었다. 또한 경북은 전남과도 0.032의 먼 유전적 거리를 나타내고 있음을 확인하였다. 종모우 집단의 경우 각 지역별 집단 간의 유전적 거리에 비해 상당히 큰 차이의 유전적 거리를 나타내고 있는데 이는 각 지역별 암소집단에 소수의 종모우를 이용해 계획 교배를 실시하고 있어 나타난 것으로 사료된다. 각 개체들 간의 유전적 거리에 대한 추정값을 계산하여 개체별 분지도를 작성한 결과 같은 지역 내의몇몇 개체들이 그룹을 이루어 존재하기는 하지만 일반적으로 넓게 분포되어 있어 각 지역별로 그룹을 이루어 존재하고 있다고 보기엔 어려움이 있음을 확인 하였다. 반면 종모우 집단의 경우 크게 두개의 그룹을 이루어 분지도 내에 분포하고 있음을 확인 할 수 있었다. 따라서 종모우의 유전적 배경이 상당히 좁게 나타나고 있음을 확인 할 수 있었으며 이러한 결과로 인해 국내의 유전자원의 다양성이 작아질 수도 있을 것으로 추정된다. 따라서 국내 유전자원의 다양성 보존을 위해 종모우의 선발 및 사업 추진에 있어 대책을 마련하기 위한 고찰이 진행되어질 필요가 있는 것으로 사료된다.